PHP安全上传图片的方法

5年以前 | 阅读数：349 次 | 编程语言：PHP

本文实例讲述了PHP安全上传图片的方法。分享给大家供大家参考。具体分析如下：

这段代码用于上传图片，可以根据图片类型检测图片是否安全，不是简单的检测扩展名


    <?php // upload.php
    echo <<<_END
    <html><head><title>PHP Form Upload</title></head><body>
    <form method='post' action='upload2.php' enctype='multipart/form-data'>
    Select a JPG, GIF, PNG or TIF File:
    <input type='file' name='filename' size='10' />
    <input type='submit' value='Upload' /></form>
    _END;
    if ($_FILES)
    {
    $name = $_FILES['filename']['name'];
    switch($_FILES['filename']['type'])
    {
    case 'image/jpeg': $ext = 'jpg'; break;
    case 'image/gif': $ext = 'gif'; break;
    case 'image/png': $ext = 'png'; break;
    case 'image/tiff': $ext = 'tif'; break;
    default: $ext = ''; break;
    }
    if ($ext)
    {
    $n = "image.$ext";
    move_uploaded_file($_FILES['filename']['tmp_name'], $n);
    echo "Uploaded image '$name' as '$n':<br />";
    echo "<img src='$n' />";
    }
    else echo "'$name' is not an accepted image file";
    }
    else echo "No image has been uploaded";
    echo "</body></html>";
    ?>

希望本文所述对大家的php程序设计有所帮助。